a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan | the technical aspects of doing something |
heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings | device consisting of a piece of machinery; has moving parts that perform some function |
any object that radiates energy | (philosophy) the philosophical theory that all phenomena can be explained in terms of physical or biological causes |
| a natural object resembling a machine in structure or function |
| the atomic process that occurs during a chemical reaction |